[Gasification] Size of blower and tumbler required to drychip in asolar kiln

Luke Gardner lgardner at wwest.net
Thu Jan 30 00:10:58 CST 2014

I built a hand crank model
16" diameter and about  7' long with varied screens and catch bins below for 
sorting originally, only to find out if I turned it less... like one rev 
whenever I passed by it became a great dryer as well.
it was a scale model of what I will build when I have both the time and 
space... they will come.
I will scale to my feed rate of my gasifier.
what do you figure you have into motorizing and blowing/ pound or ton of 
looking for a Kw/ton figure to bring chips from green to dry... on an 
average day at roughly 30rpms, with your electricly induced ambient breeze?
not looking for cost of equipment, but the cost to run it/ton?
if you don't mind
Luke Gardner

-----Original Message----- 
From: Pete & Sheri
Sent: Monday, January 27, 2014 8:43 PM
To: 'Discussion of biomass pyrolysis and gasification'
Subject: Re: [Gasification] Size of blower and tumbler required to drychip 
in asolar kiln

Motor size???
I don't know either, but here's a place to start:

We have lots of used grain cleaners here in the Midwest USA.  Almost every
implement dealer has them.  Go take a look
At any farm implement dealer's stock.

I bought two of them last year (one in partnership) and converted them to
sorting, not drying, wood chips.
One of them has a 36" diameter "drum" that is 72" long and it runs at about
44 rpms.  It came with a one hp 1725 capacitor start general purpose motor.
I think that was more than needed.
The other one has a  drum is 24" in diameter and 60 inches long. Personally,
I think its one hp capacitor start motor is overkill too. It originally ran
at about 30 rpm, but I slowed it to 22 rpm.  Still overkill, I think.
   The  screens on these machines have been changed to classify the chips to
the sizes we need.  So, in our case we DO want the material to progress down
the trammel in just a minute or two from the time it is poured in.  Our
machines are tilted at maybe 10° or less for our application.  For drying, I
think you'd want an even lower angle.  Make sure your machine has a tilt
mechanism that allows for change in this range.
  I  have used a common window "box fan" aimed at the trommel to blow light
chips and dust away from the "keepers" chips.
For me, it seems to work better to sort the chips BEFORE drying them.  That
way air flows better through them because the small stuff is gone.  And, of
course, there is less material that needs to be dried.

  You can see these grain cleaners/chip sorters on my youtube channel:

Pete Stanaitis

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